<template>
    <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar
      class="page-nav-bar"
      left-arrow
      :title="lists.title"
    ></van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      <!-- 加载中 -->
      <div class="loading-wrap" v-if="isflog">
        <van-loading
          color="#3296fa"
          vertical
        >加载中</van-loading>
      </div>
      <!-- /加载中 -->
      <!-- 加载完成-文章详情 -->
      <div class="article-detail" v-else-if="lists.art_id">
        <!-- 文章标题 -->
        <h1 class="article-title">{{lists.item}}</h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-info" center :border="false">
          <van-image
            class="avatar"
            slot="icon"
            round
            fit="cover"
            :src="lists.aut_photo"
          />
          <div slot="title" class="user-name">{{lists.aut_name}}</div>
          <div slot="label" class="publish-date">{{lists.pubdate}}</div>
          <guanzhi :articl='this.lists'></guanzhi>      
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 -->
        <div class="article-content markdown-body" v-html="lists.content" ref="image"></div>
        <wenzpinlun :lists='this.id' @tiaoshu="iotts($event)"></wenzpinlun>
        <!-- <van-divider>正文结束</van-divider> -->
      </div>
      <!-- /加载完成-文章详情 -->

      <!-- 加载失败：404 -->
      <div class="error-wrap" v-else-if="isnan">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div class="error-wrap" v-else>
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button class="retry-btn">点击重试</van-button>
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>
    <!-- 底部区域 -->
    <div class="article-bottom">
      <van-button
        class="comment-btn"
        type="default"
        round
        size="small"
        @click="isPostShow = true"
      >写评论</van-button>
      <van-icon
        name="comment-o"
        :info= pot
        color="#777"
      />
      <van-icon
        color="#777"
        name="star-o"
      />
      <van-icon
        color="#777"
        name="good-job-o"
      />
      <van-icon name="share" color="#777777"></van-icon>
    </div>
    <!-- /底部区域 -->
    <van-popup
      v-model="isPostShow"
      position="bottom"
    >
    <xiepinlun></xiepinlun>
    </van-popup>
  </div>
</template>
<script>
import { getArticleById } from '@/api/wenzhang.js'
import guanzhi from '@/components/guanzhi.vue'
import wenzpinlun from '@/components/wenzpinlun.vue'
import xiepinlun from './compon/xiepinlun.vue'
import './github-markdown.css'
import { ImagePreview } from 'vant'
export default {
  data:function(){
    return {
      lists:{},
      isflog:true,
      imglist:[],
      isnan:false,
      pot:'',
      isPostShow: false
    }     
  },
  components:{
    guanzhi,
    wenzpinlun,
    xiepinlun
  },
  props:{
    id:{
      type: [Number, String],
      required: true
    }
  },
  methods:{            
    async getlis(){     
      try {
        const list = await getArticleById(this.id)
        this.lists = list.data.data
        console.log(this.lists)
        // 获取所以的img标签
        const ss = document.querySelectorAll
        this.$nextTick(function(){            
          this.getimg()
        })
        this.isflog = false       
      } catch (error) { 
        this.isflog = false 
        if (error.response && error.response.status === 404){              
          this.isnan = true            
        }                               
      }              
    },
    iotts(val){
      this.pot = val
    },
    getimg(){
      // 获取所以的img dom对象
      // console.log()
      const that = this
      const img = this.$refs.image.querySelectorAll('img')
      img.forEach((element,value) => {
        this.imglist.push(element.src)               
        element.onclick = function(){
          ImagePreview({
            images:that.imglist,
            startPosition: value
          })         
        }
      })            
    }
  },
  created(){    
    this.getlis()  
  }
}
</script>
<style  lang="less">
.article-container {
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
}
</style>
